Screw pulverizer or harrow



Law,

2 N. 0 S Dm. E m... T An P. M TU..

(No Model.)

SCREW PULVEVRIZE'R 0R HARROW.

Patented June 30 @Jlmllllllmllllllllllli l lIl vMM 01 ANDREW BLRANAM.PHGTWUMWASHINGDKDK (No Model.) 2 Sheets-Sheet 2.

J. M. PATTERSON. SCREW :PULVBRIZER 0R HARROW.

No. 563,057. Patented'Ju'ne s0, 1896.

ANUREw E GRAHAM PNGTQ Lm\0 WASHINGIUILDC UNITED STATES PATENT OEEICE.

JOHN M. PATTERSON, OF LA FAYETTE, GEORGIA.

SCREW PULVERIZER OR HARROW.

SPECIFICATION forming part 0f Letters Patent N0. 563,057, dated June 30,1896.

Application led September 20, 1895. Serial No. 563,122. (No model.)

To all whom it may concern.-

Be it known that I, JOHN M. PATTERSON, a citizen of the United States,residing at La Fayette, in the county of Walker and State of Georgia,have invented certain new and useful Improvements in Screw Pulverizersor I-Iarrows; and I do hereby declare that the following specication,taken in connection with the accompanying drawings, is a full, clear,and exact description of my invention, such as will enable those skilledin the art to make and use the same.

My invention relates to improvements in the form of pulverizers orharrows comprising, essentially, one or more spiral or screw cuttersadapted to be rotated in contact with the ground to be broken up.

My invention consists, essentially, of a suitable sulky-frame from whichis supported the spiral or screw cutters, suitable mechanism beingprovided for rotating the cutters while in contact with the ground, andsuitable mechanism being provided for holding the cutters to their workand for raising them out of contact with the ground and holding them inelevated position when not in operation.

In order that my invention may be fully understood, I will firstdescribe the same with reference to the accompanying drawings, andafterward particularly point out the novelty in the annexed claims.

In said drawings, Figure l is a top plan view of my improved pulverizer.Fig. 2 is a side elevation of the same. Fig. 3 is an inside sectionalelevation of the same, taken on the line 3 3 of Fig. 1. Figs. 4, 5, 6,and 7 are detail views showing the structure of the clutch mechanismlocated in the hubs of the supportin g-wheels for throwing the spiralcutters in and out of operation. Figs. 8 and 9 are detail viewsillustrating the construction of the spiral cutters. Fig. 10 is a detailview showing one of the pivoted standards in which the roller-bearing onthe spring is carried.

The sulky-frame comprises a tongue 1, the cross-bars 2 3, to which thetongue is secured, the-side bars 4 5, extending between the crossbars 2and 3, and the pairs of auxiliary side bars 6 6L and 7 7 u, which arerigidly secured to the side bars 4 and 5 and cross-bar 3 at theirforward ends, and which are formed with journal-openings in their rearends.

-direction without rotating the axle 8.

3 is the main supporting-axle, which passes through the journal-openingsin the rear ends of the auxiliary side bars 6 6a and 7 7 n.

9 are the supporting-wheels loosely journaled on the outer ends of theaxle 8. Each of the wheels 9 is formed with internal ratchetteeth 10 inits hub, with which engages a pvoted spring-pawl 11. The pawl 11 ispivotally mounted upon the outer face of the hubsection l2, which iskeyed to the axle 8 close up against the hub of the wheel 9.

13 is a small spring having a hook end 14, which is adapted to engagethe shoulder 1la of the pivoted pawl 11 and hold the same out ofengagement with the internal ratchet-teeth 10. The spring 13 normallyforces the pawl 11 outwardly into engagement with the ratchetteeth 10,but when the pawl is forced back by means of the pin 15, which projectsthrough the curved slot 16 of the hub-section 12, the hook end 14 of thespring 13 will engage the shoulder 11 and hold the pawl out ofengagement with the ratchet, so that the wheels 9 will be allowed torevolve in either When the pawl 11 is in engagement with theratchetteethvlO, it will be observed that the forward movement of thewheels 9 will rotate the axle 8, whereas the backward movement of thewheels 9 will merely cause the ratchet-teeth to slip past the pawl andwill not rotate the axle 8.

Pivotally mounted upon the axle S between the frame-pieces 6 6a and 7 7are the rearwardly-extending side bars 20, which are centrally connectedby the cross-bar 21 and have j ournaled in their outer ends thecutter-shaft 22. Extending around the cutter-shaft 22 are two spiralribs 23 and 24, which extend in opposite directions, and upon these ribsthe screw-blades or spiral cutters are mounted. sections or flights 25,having radial arms 25, which are secured to the spiral ribs 23 and 24,and tongue-and-groove joints 26 at their contiguous edges. Plates 27overlap the joining edges of the sections or iights and are secured inplace by rivets. Y

Keyed to the outer end of the shaft 22 is a sprocket-wheel 30, and keyedto theaxle S in line with the sprocket-wheel 30 is a largesprocket-wheel 31. A sprocket-chain 32 ex- The spiral cutter-blades areformed of IOO tends around the sprocket-wheels 30 and 31 forcommunicating motion from the latter to the former.

35 are bifurcated standards journaled upon the axle 8 and carrying neartheir upper ends the rollers 36.

37 are long curved leaf-springs pivoted at their forward ends to theframe-sections 4 and 5 and extending over and having their rear endsresting upon the side bars 20 and exerting pressure thereon for holdingthe spiral cutters to their work. The springs 37 pass through standards35 under the rollers 36, which bear on the springs for holding them inposition. 3S are U-shaped crank-arms journaled upon the upper face ofthe cross-bar 2 and connected to the upper ends of the standards 35 bymeans of the links 39, and to an operating hand-lever 40 through thelink 4l.

43 is a rack in which the hand-operated spring-pawl 44 engages forholding the handlever in any desired position. By this means theposition ofthe standards can be changed and the amount of pressure ofthe rollers 36 upon the springs 37 regulated.

45 is an arm pivoted upon the axle 8 and connected through chain 46 tothe bar 2l of the rear frame, and through link 48 with the hand-lever.By means of this connection the frame carrying the spiral cutters can beraised or lowered out of or into operative position, and when thecutters are lowered the rollers 36 will press upon the springs 37,whereas when the cutters are raised the pressure will be removed.

50 is the drivers seat.

Having thus fully described my invention, the following is what I claimas new therein and desire to secure by Letters Patent:

l. In a harrow or pulverizer, the combination of a sulky-frame, arotatable pulverizerscrew suitably supportedl from the sulkyframe,suitable means for rotating the screw from the axle of the sulky-frame,the supporting-wheels loosely j ournaled upon the axle and formed withratchet-teeth in the hub, separate hub-sections keyed to the axle closeup against the supporting wheels, springpawls carried by said separatehub-sections and adapted to engage the ratchet-teeth of thesupporting-wheels, and suitable catches for holding the pawls out ofoperative position, substantially as set forth.

2. In a harrow or pulverizer, the combination of the sulky-frame havinga rotatable axle and loosely-journaled supporting-wheels, a rotatablepulverizer-screw suitably supported from the sulky-frame, suitable meansfor rotating the screw from the rotatable axle; and ratchetclutchesbetween the supportingwheels and axle, each comprising ratchetteeth onthe supporting-wheel, a separate hubsection keyed to the axle, a pivotedpawl carried by the separate hub-section and adapted to engage theratchet-teeth, a spring adapted to hold the pawl to its work, a hook onthe spring adapted to hold the pawl out of operation, and an armextending from the pawl through a slot in the separate huh-section bymeans of which the pawl can be pushed back into engagement with thehook, substantially as set forth.

3. The combination of a suitable frame or carriage having a rotatablesupporting-axle and loosely journaled supporting wheels, with a clutchbetween the axle and wheels comprising suitable ratchet-teeth, a pivotedpawl adapted to engage the ratchet-teeth, a shoulder formed on the pawl,a spring engaging the pawl and formed with a hook end and adapted toengage the shoulder of the pawl, and an arm by which the pawl can bemoved, substantially as set forth.

4. In a harrow or pulverizer, the combina tion of a suitablesupporting-frame, with a rotatable spiral cutter or screw constructedofa rotatable shaft having a spiral rib extending around it, and a seriesof spirally-set sections or nights formed with radial arms which aresecured to the spiral rib and having their meeting ends secured togetherby tongue-andgroove and overlapping securing-plates riveted to thesections,substantially as set forth.

5. The combination of the sulky-frame, the pulverizer mounted in asuitable frame pivoted to the sulky-frame upwardly-curved leaf-springsconnected at one end to the sulky-frame and bearin g at the other endupon the pulverizer-frame, and a pressure device adapted to bear on thecurve of the spring for regulating the pressure of the springs,substantially as and for the purpose set forth.

6. The combination of the sulky-frame, the pulverizer-frame pivotedthereto and carrying the pulverizer leaf-springs secured to thesulky-frame and extending over and engaging the pulverizer-frame,pivoted standards embracing the springs and carrying rollers whichengage the springs, and means for moving the standards for impartingmore or less pressure through the spring to the pulverizer, as setforth.

7. The combination of the sulky-frame, the pulverizer-frame pivotedthereto and carrying the pulverizer leaf-springs secured at their endsto the sulky-frame and extending over and engaging the pulverizer-frame,pivoted standards embracing the springs and carrying rollers which bearupon the springs and hold them to their work, a hand-lever having a pawland rack, and suitable lever connections between the standards andhand-lever, substantially as set forth.

S. The combination of the sulky-frame, the pulverizer-frame pivotedthereto and carrying the pulverizer, leaf-springs secured at their endsto the sulky-frame and extending over into engagement with thepulverizer-frame, bifurcated standards pivoted to the supporting-axleand embracing the leaf-springs and carrying rollers which bear upon thesprings IOO IXO

and hold them to their work, crank-levers into engagement with thepulverizer-frame, 15

means controlled by a hand-lever for applying pressure to and removingpressure from said springs, and independent connection between thepnlVerizer-frame and hand-lever,

whereby the pulverizer-frame can be lifted 2o when the pressure isremoved from the springs, and Vice versa, substantially as set forth.

JOHN M. PATTERSON.

Witnesses:

W. M. SCOTT, J. P. SHATTUCK.

